US Bridges

Mullan Trail RD over I90;MULLAN Trail RD Ic

Fair

Kootenai County, Idaho · 1.0 E. Coeur Dalene · Structure no. 000000000016899

Built
1991
34 years old
Condition
Fair
inspected March 2021
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
229 ft
2 main spans
Daily traffic
1,000
2023 count
Owner
State
State Highway Agency

About this bridge

Mullan Trail RD over I90;MULLAN Trail RD Ic is a concrete continuous box beam or girders - single or spread carrying Mullan Trail RD over I90;MULLAN Trail RD Ic in Kootenai County, Idaho. It was built in 1991, so it is 34 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,000 vehicles a day, projected to reach 1,500 by 2042. The structure is 229 ft (69.8 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMullan Trail RD
CrossesI90;MULLAN Trail RD Ic
Location1.0 E. Coeur Dalene
RouteCounty Highway 0
CountyKootenai County
StateIdaho
Coordinates47.65525, -116.72775
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length229 ft (69.8 m)
Longest span121 ft (36.9 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,500 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mullan Trail RD over I90;MULLAN Trail RD Ic built?

It was built in 1991, making it 34 years old in 2025.

What condition is Mullan Trail RD over I90;MULLAN Trail RD Ic in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2021.

How much traffic does Mullan Trail RD over I90;MULLAN Trail RD Ic carry?

About 1,000 vehicles per day (2023 count).

How long is Mullan Trail RD over I90;MULLAN Trail RD Ic?

The structure is 229 ft (69.8 m) long with a longest span of 121 ft (36.9 m) and a deck 40 ft wide.

Who owns Mullan Trail RD over I90;MULLAN Trail RD Ic?

It is owned by the State Highway Agency.